2. Single-line system method: a single fishing line passes through the eight-character ring twice, and the fishing line forms a closed circle. Wrap the thread head around the closed ring and the main line for 4-5 times, then thread the thread head through the closed ring and tighten it.
3. Double-line binding method: Fold the fishing line in half, wrap the passed fishing line head around the other three lines for 4-5 times, then pass the line head through the circle formed by the folded fishing line and tighten it.
4. Double-line binding method: the fishing line is folded in half and passes through the eight-character ring three times, and the fishing line forms a closed circle. Wrap the thread head around the closed ring and the main line for 4-5 times, then thread the thread head through the closed ring and tighten it.